pub(crate) fn fill_compilers(sess: &mut Session)Expand description
Probes for C and C++ compilers and configures the corresponding entries in the Session
structure.
This function determines which targets need a C compiler (and, if needed, a C++ compiler)
by combining the primary build target, host targets, and any additional targets. For
each target, it calls fill_target_compiler to configure the necessary compiler tools.